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J.C. Ludowici & Son Ltd. Patents
J.C. Ludowici & Son Ltd.
New South Wales, AU
No. of patents:

Patent Number Title Of Patent Date Issued
6247513 Pressure indicating tire inflation valve June 19, 2001
A tire inflation valve stem comprises a stationary, radially outer stem part (3); a movable, radially inner stem part (4) slidable axially within the outer part; a compression reaction spring (20) extending between the core parts; and a flexible barrier (23) extending from one core part
4438935 Fluid seals March 27, 1984
A homogeneous self energizing seal comprising an annular member having side walls, a top and a bottom forming the trunk of the seal, the side walls are provided with chamfered upper portions the upper edges of which merges into flat portions on the top of the seal, the bottom edges of th

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